Are you using Ultimate Family Tree? Some people get UFT and FTM mixed up. I'm not certain that the box chart created in UFT allows for pictures. I know you can edit the graphics for the number of boxes across and down to be printed on a page, the border style, fonts and things like that. Check your manual for this info or you might check the Knowledge base above.
You can view a media tree in UFT, but there isn't any way of printing it on a large scale unless you do a print screen and paste it in a word processor and do a lot of finagling with it that way.